Smokeless furnace.



PATENTED FEB. E, 1906.

F. D. SHEPHERD.

SMOKELESS RNAGE.

2 SHEETS-SHEET lv FRANK D. SHEPHERD, OF SALT LAKE CITY, UTAH.

SMOKELESS FURNACE.

Specification of' Letters Patent.

Patented Feb. 6, 1906.

Application l'lled March 18, 1964. Serial No. 198,810.

To will whom it may concern.:

Be it known that I, FRANK D. SHEPHERD, of Salt LakeCity, in the county of Salt Lake, and in the State of Utah, have invented a certain new and useful Improvement in Smokeless Furnaces and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in Which- Figures 1, 2, and 3, are respectively vertical, horizontal, and transverse sectional views of a furnace embodying my invention.

The object of my invention has been to provide a furnace which shail be capable of being operated to produce a substantially smokeless fire; and to such end my invention consists inl the furnace hereinafter specified.

In carrving my invention into practice I provide the usual boiler A, inclosed in side Walls B, a back wall C, and a front Wall D. The front wall is provided with two or more fire-doors d. The ate E is supported between the front wal and a bridge-wall F, the latter extending from the floor u to and some distance above the level of tie grate, but not extendin to the under side of the boiler. A vertica partition-wall G, which is preferably thin, divides the ash-pit and extends from the front wall to the bridge-Wall and from the iioor to the grate. A partitionwall at the rear of the bridge-Wall extends up to and in contact with the lower side of the boiler. A flume H extends through the upper portion of the bridge-Wall and through the partition-wall and o ens up to the lower side of the boiler. Said walls increase the depth of the flume where it passes through the bridge-wall. The flume preferably increases in Width and depth as it extends rearward. Opposite the rear end of the ilurne an arc-shaped deflector-wall I is built upon the floor and extends nearly up to the lower surface of the boiler. The defiector-wall may be braced by a Wall K in the rear thereof, if desired.

In operatin my furnace fresh fuel is fed to but one side o the grate at a time, and I refer to close the ash-pit door upon that si e of the rate while the hydrocarbons are being disti led, for the reason that such action causes a slower distillation of the hydrocarbons and affords a better opportunity for their consumption. As the hydrocarbons are distilled they pass, owing to the draft, through the flue, and there they are met by the incandescent gases from the opposite side of the grate and are mixed with such gases so that their combustion is assured. Theflume being flaring provides room for the constantly-increasingvolume of gases without causing any choking action. strike the deflcctor and are thrown rearward and upward a einst the sides of the boiler immediately in t ie rear of the partition-wall, so that such portions of the boiler are thoroughly heated.

I have found in actual practice that the construction above illustrated is exceedingly effective in consuming the smoke which is unavoidably produced over the grate.

My construction can be a plied to a furnace without cutting down tfie grate-surface and without interfering with the repair or replacement of the grate.

It is obvious that various changes can be made in the above-illustrated construction which will be within the scope of my invention.

Having thus described my invention, what I claim is- 1. A furnace, comprising a grate, a longitudinal partition-Wall dividing the ash-pit, beneath the grate, a bridge-Wall supporting thc rear end of the grate, doors upon either side of said partition-Wall, a second partitionwall in rear of said brid e-Wall, and extending from the Hoor to t e lower side of the boiler, a flume extendin through said bridgewall and through sai partition-Wall, side walls built on said bridge-wall for increasing the depth of said flume, said side Walls flaring rearwardly, and a curved defleotor-Wall opposite the rear exit of said fiume and presenting a concave face toward said fiume.

2. In afurnace, the combination of a grate, a bridge-Wall having a Hume formed therein which fiume is open at its forward end and is open above to the boiler, and a deflector-wall opposite the rear end of said flume to deflect theugases upward toward the boiler and latera Y.

3. yIn a furnace, the combination of a grate, a brid e-wall, and a partition-wall, there being a lIume constructed through said bridgewall and said partition-wall, and a deflectorwall spaced from the rear end of said flume for throwing the gases u Ward and laterally against the under side o the boiler.

4. In a furnace, the combination of a grate, a brid e-wall, and a partition-wall, there being a urne constructed through said bridge- Wall and said partition-wall, and a deflector- As the gases leave the flume they IOO IIO

wall spaced from the rear end of said flume for throwing the gases upward and laterally against the under side of' the furnace, said flume increasing in crosssectional area progressively in a rearward direction.

5. In a furnace, the combination of' a front wall having air-admitting openings at each side of the center and below the level of the grate, a grate, a longitudinal wall beneath the grate and dividing the ash-pit into two chainers, a bridge-wall, and a partition-wall having a flume extending therethrough, and a deflector-wall opposite the rear end of said flume and having a rentrant front face, said dellector-wall being adapted to throw the flames against the under side of the boiler.

6. In a furnace, the combination of a front wall having air-admitting openings in each side of the center and below the level of the grate, a grate, a longitudinal wall beneath the grate and dividing the ash-pit into two chamiers, a bridge Wall, a partition wall, said bridge and partition walls having a flume extending therethrough, and a dellector-wall opposite the rear end of said flume and having a rentrant front face, said flume having side walls built upon said bridge-wall for increasing its depth.

7. In a furnace, the combination of a grate, a bridge-wall, and a flume passing through said bridge-wall, and formed artially by vertical walls extending forward oni said bridgewall, said vertical walls approaching each: other in a rearward direction.

In testimony that I claim the foregoing have hereunto set Iny hand.

FRANK D. SHEPHERD. Witnesses:

WILLIAM JAOKMAN, DELos IRISH. 

